US11376092B2 - Parallax-free indicator devices, systems, and methods - Google Patents

Parallax-free indicator devices, systems, and methods Download PDF

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Publication number
US11376092B2
US11376092B2 US16/324,379 US201716324379A US11376092B2 US 11376092 B2 US11376092 B2 US 11376092B2 US 201716324379 A US201716324379 A US 201716324379A US 11376092 B2 US11376092 B2 US 11376092B2
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housing
alignment
light source
alignment indicator
indicator
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US20190175298A1 (en
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Nicholas Muir
Nathan A. Winslow
Stephen H. Hoag
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Biomet Manufacturing LLC
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Biomet Manufacturing LLC
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/10—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges for stereotaxic surgery, e.g. frame-based stereotaxis
    • A61B90/11—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges for stereotaxic surgery, e.g. frame-based stereotaxis with guides for needles or instruments, e.g. arcuate slides or ball joints
    • A61B90/13—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges for stereotaxic surgery, e.g. frame-based stereotaxis with guides for needles or instruments, e.g. arcuate slides or ball joints guided by light, e.g. laser pointers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/14—Surgical saws ; Accessories therefor
    • A61B17/15—Guides therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/17—Guides or aligning means for drills, mills, pins or wires
    • A61B17/1739—Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body
    • A61B17/1778—Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body for the shoulder
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/30—Devices for illuminating a surgical field, the devices having an interrelation with other surgical devices or with a surgical procedure
    • A61B90/35—Supports therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
    • A61B17/90—Guides therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00681—Aspects not otherwise provided for
    • A61B2017/00734—Aspects not otherwise provided for battery operated
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/30—Devices for illuminating a surgical field, the devices having an interrelation with other surgical devices or with a surgical procedure
    • A61B2090/309—Devices for illuminating a surgical field, the devices having an interrelation with other surgical devices or with a surgical procedure using white LEDs
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/36—Image-producing devices or illumination devices not otherwise provided for
    • A61B90/361—Image-producing devices, e.g. surgical cameras
    • A61B2090/3618—Image-producing devices, e.g. surgical cameras with a mirror
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
    • A61F2/4612—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof of shoulders

Definitions

  • the present disclosure relates to parallax-free indicator devices, systems, and methods for use in surgical procedures.
  • Many orthopedic surgical procedures include steps requiring particular orientation of a portion of patient's anatomy with respect to another portion of the patient's anatomy or to a medical device, such as a surgical tool or an implant.
  • a medical device such as a surgical tool or an implant.
  • One example of such a procedure is shoulder replacement surgery, where accurately determining humeral version is important to achieving an optimal patient outcome.
  • Humeral version can be described as the rotation of the humeral head relative to the epicondylar axis of the elbow.
  • Version rods attached to surgical instruments can be used to aid healthcare providers in visually determining proper orientation of the patient's anatomy.
  • visually determining orientation, or humeral version remains prone to inaccuracy due to user-induced error.
  • the present inventors have recognized that visual determination of proper orientation of patient anatomy using version rods is prone to inaccuracy based on a user's position with respect to the version rod and the patient anatomy of interest and, additionally or alternatively, variability of one or more user's position, as such orientation is sought to be maintained or recreated during the course of a procedure.
  • Such inaccuracy is related to “parallax” or a displacement or difference in the apparent position of an object viewed along two different lines of sight.
  • Devices, systems, and methods for accurately determining and maintaining anatomical orientation, regardless of a person's or machine's line of sight, would therefore be desirable. Accordingly, the present teachings provide for parallax-free indicator devices, systems, and methods.
  • the device can comprise a housing and a light source assembly at least partially disposed in the housing.
  • the housing can define an aperture.
  • the housing can be selectively securable via a fastener to an instrument in a selected orientation relative to the instrument.
  • the light source assembly can comprise a light source that can be operably coupled to a power source via a power circuit.
  • the light source can be positioned within the housing to emit through the aperture of the housing.
  • the light source assembly can emit a parallax-free alignment indicator along an alignment axis.
  • the alignment axis can have at least one of a selected angle and a selected displacement relative to a selected reference axis.
  • the alignment indicator can guide a surgical procedure.
  • the present teachings also provide for methods for accurately determining anatomical orientation and, additionally or alternatively, maintaining or recreating anatomical orientation during the course of a surgical procedure.
  • Such methods can comprise securing a device to a surgical instrument, activating a light source of the device to project an alignment indicator along an alignment axis, aligning an anatomical feature of a patient with the alignment indicator, and fixing the position of at least a portion of a surgical instrument relative to a surgical site on the patient.
  • FIG. 1 illustrates an alignment indicator device registered to, or connected to, a surgical instrument that is installed in the humerus, according to an exemplary embodiment of the invention
  • FIG. 2 illustrates one aspect of an alignment indicator device
  • FIG. 3 illustrates another aspect of an alignment indicator device
  • FIG. 4 illustrates another aspect of an alignment indicator device
  • FIG. 5 illustrates another aspect of an alignment indicator device
  • FIG. 6 is a flow chart illustrating an exemplary process of anatomical registration of an alignment indicator device to a surgical site.
  • the present teachings provide for parallax-free indicator devices, systems, and methods.
  • Such devices, systems, and methods can facilitate accurate orientation of patient anatomy regardless of a user's position with respect to the indicator device and the patient anatomy of interest and, additionally or alternatively, regardless of variability of any user's position as such orientation is sought to be maintained or reestablished during the course of a procedure.
  • the devices, systems, and methods disclosed herein can enable accurate determination and maintenance or reestablishment of humeral version through reaming, rasping, resection, and implant insertion during a shoulder replacement procedure regardless of the position of any user with respect to the indicator device or the patient's forearm.
  • a system 100 comprises a surgical instrument 102 and a parallax-free alignment indicator 104 .
  • the surgical instrument 102 and alignment indicator device 104 of the present teachings can be used in combination for accurate anatomical alignment prior to and/or during a surgical procedure.
  • the alignment indicator 104 can be selectively, temporarily coupled to the surgical instrument 102 at one or more steps during a surgical procedure.
  • the alignment indicator 104 can be incorporated into the surgical instrument 102 .
  • the surgical instrument 102 can comprise a resection guide assembly.
  • an alignment indicator device 200 can comprise a housing 202 and at least one light source assembly 204 at least partially disposed in the housing 202 .
  • the housing 202 can define an aperture 206 .
  • the housing 202 can be selectively securable via a fastener 208 to an instrument 102 in a selected orientation relative to the instrument.
  • the light source assembly 204 can comprise a light source 210 that can be operably coupled to a power source 212 via a power circuit 214 .
  • the power source 212 can comprise, for example and without limitation, a battery, a solar cell, a power cord to engage an electrical outlet, and the like.
  • the power circuit 214 can comprise a switch disposed on the exterior surface of the housing or electronic components to enable remote operation of the alignment indicator device 200 .
  • the light source 210 can be positioned within the housing 202 to emit through the aperture 206 of the housing 202 .
  • the light source assembly 204 can emit a parallax-free alignment indicator 216 along an alignment axis 218 .
  • the alignment axis 218 can have at least one of a selected angle ⁇ and a selected displacement ⁇ relative to a selected reference axis.
  • the alignment indicator 216 can comprise, for example and without limitation, light in the form of a line, a dashed line, a dot, a scale, a logo, a geometric shape, and the like.
  • the light source 210 can comprise, for example and without limitation, a laser or a light-emitting diode (LED).
  • the alignment indicator 216 can serve as a guide surgical procedures that require accurate alignment and/or version such as, for example and without limitation, bone resection, implantation of arthroplasty implants, and the like.
  • the alignment indicator 216 can be used to mark the patient's anatomy to facilitate maintenance of alignment or realignment during a procedure.
  • the light source assembly 204 can comprise a lens assembly 224 that can selectively adjust the angle and the displacement of the alignment indicator 216 relative to the selected reference axis.
  • the lens assembly 224 can comprise either or both of a mirror and a lens.
  • the lens assembly 224 can further comprise a plurality of either or both of a mirror and a lens.
  • the lens assembly 224 can be fixed or can be adjustable to change one or more of the orientation, intensity, or form of light emitted from the alignment indicator device 200 . At least one of a lens and a mirror in the lens assembly 224 can be fixed.
  • the lens assembly 224 (and hence the orientation, intensity, and/or form of light) can be adjusted by a controller 222 .
  • lens assembly 224 can be manually adjustable by a user rotating adjuster 225 .
  • the controller 222 can have a controller interface operably coupled to the adjuster 224 . While FIGS. 4-5 show a manual adjuster 225 , it bears emphasis that adjustments to the orientation, intensity, and/or form of light in alignment indicator 216 may occur using all electrical and/or a combination of electrical and mechanical components.
  • the controller 222 can comprise electronic components, servo motors, and circuits that allow for adjustment of the alignment indicator 216 (i.e., the orientation, intensity, and/or form of light).
  • the controller 222 may also allow for remote operation of the controller 222 and remote adjustment of the alignment indicator 216 via either a wired or wireless connection with a computer and controller interface.
  • the controller interface can be on the alignment indicator device 200 or remote thereto, such that the controller 222 can be controlled remotely.
  • the adjuster 225 can be adjusted via the controller 222 based on manipulation of the controller interface by a user.
  • the alignment indicator 216 can be adjustable about a continuum of angles with respect to a selected reference axis. Alignment axes about which the alignment indicator 200 can be rotated can include axis 218 , 219 , and 220 . In at least one aspect of the invention, the alignment indicator 200 can be rotated about these axes, as indicated by arrows 218 x , 219 x , and 220 x , to adjust the roll, pitch, and yaw of the alignment indicator 216 . Such rotation can occur manually using adjuster 225 and/or using electronic components, servo motors, and circuits in the controller 222 .
  • a light beam can be rotated about at least three axes to adjust the roll, pitch, and/or yaw of the light beam. This can be accomplished by rotating external components of the alignment indicator device 200 , such as housing 202 or light source assembly 204 , or by adjusting internal components, such as lenses and mirrors, as explained above.
  • the alignment indicator 216 can be continuously adjustable or can be adjustable in fixed increments about one or more of the alignment axes.
  • the orientation of the alignment indicator 216 can be an output of the controller operably coupled to the adjuster. More specifically, the orientation, or humeral version, can be output in a numerical format on a display or by projecting a number as part of, or separate from, the alignment indicator 216 using light source 210 . If a numerical representation of the humeral version is output on a display, the display can be located on the adjustment indicator device 200 itself (e.g., on housing 202 or as part of controller 222 ), or remote to the alignment indicator device (e.g., on a computer that controls the controller 222 ).
  • details of a specific surgery or patient may be uploaded to a computer and the controller 222 to thereby input a desired humeral version to the system.
  • the desired humeral version may be patient-specific in that the humeral version depends on a particular patient's anatomy for a particular surgical procedure.
  • the desired humeral version may be doctor-specific, in that a particular doctor may prefer a particular orientation of the humerus relative to other anatomy when performing a particular surgical procedure.
  • controller 222 may receive the input humeral version from the computer and adjust the alignment indicator to the proper orientation. Displaying the humeral version on a display would aid in ensuring that the desired humeral version has been achieved.
  • the alignment indicator device 200 can further comprise a plurality of alignment indicators 216 .
  • Each of the plurality of alignment indicators 216 can be projected along an axis relative to a unique selected reference axis.
  • each of the plurality of alignment indicators 216 can be projected along an axis having a unique selected angle relative to the selected reference axis.
  • each of the plurality of alignment indicators 216 can be spaced along the alignment axis.
  • Such a plurality of alignment indicators 216 can be useful to provide a surgeon with options or can be useful in order to index the procedure or additional procedures relative to additional anatomical sites, surgical instruments, or implants.
  • the alignment indicator device 200 when performing an elbow, wrist, hand, or glenoid procedure concurrently with a shoulder replacement procedure, can be used to align or orient multiple anatomical features.
  • an alignment indicator 216 or one of a plurality of alignment indicators 216 can be used to compare and adjust limb length across the midline of the body using the opposite limb, e.g., using the anatomical characteristics of the right arm to align the anatomical characteristics of the left arm.
  • the alignment indicator device 200 can have multiple alignment indicator settings or modes (or visual variations on a single alignment indicator setting) and can comprise a switch or setting to modulate or toggle between the settings.
  • the alignment indicator device 200 can comprise a control to change the appearance of the alignment indicator 216 .
  • the fastener 208 of the housing 202 can comprise, for example and without limitation, a magnet, a threaded member, a clip, and the like.
  • the fastener 208 can further comprise a vibration dampener.
  • the vibration dampener can comprise a spring.
  • fastener 208 may comprise a servo motor fastened to instrument 102 and which allows alignment indicator device 200 to rotate about one or more alignment axes.
  • the alignment indicator device 200 can comprise a power circuit 214 that can have a first lead 214 A and a second lead 214 B (see FIGS. 2 and 4 ), both exposed on an exterior surface of the housing 202 designed to contact a metal object to complete the power circuit 214 and activate the light source 210 .
  • the metal object can comprise a portion of the instrument 102 .
  • the metal object can comprise a portion of the fastener 208 of the housing 202 .
  • the metal object can comprise another device or instrument proximate the patient.
  • first lead 214 A and the second lead 214 B of the power circuit 214 can be inside the housing and the power circuit 214 can be completed upon, e.g., application of pressure to a pressure switch or via pressure when the alignment indicator device 200 is secured to another object.
  • the light source assembly 204 can comprise an interchangeable cartridge 226 that can be receivable within the housing 202 .
  • the modular cartridge 226 can be used in a plurality of either disposable or reusable housings 202 in order to increase intraoperative flexibility.
  • at least one of the housing 202 or modular cartridge 226 can comprise a power source 212 that can be rechargeable.
  • modular cartridge 226 can contain information specific to a patient or a specific surgery, such as settings for either or both of the light source assembly 204 and the controller 222 . In one aspect, such information can be contained on a memory card.
  • the present teachings provide for methods for accurately determining anatomical orientation and, additionally or alternatively, maintaining or recreating anatomical orientation prior to and/or during a surgical procedure.
  • Such methods can comprise securing a parallax-free alignment indicator device 200 to a surgical instrument, activating a light source 210 of the device 200 to project an alignment indicator 216 (e.g., laser light or LED light) along an alignment axis, aligning either or both of another surgical instrument and an anatomical feature of a patient with the alignment indicator 216 , and either or both of using the alignment indicator 216 to guide a manual cut and fixing the position of at least a portion of the surgical instrument 102 relative to a surgical site on the patient.
  • an alignment indicator 216 e.g., laser light or LED light
  • the method can further comprise providing a mark on the patient along the alignment indicator 216 .
  • the surgical instrument can be a cut guide assembly.
  • the surgical site can be a proximal humerus.
  • the anatomical feature of the patient can comprise a forearm.
  • a method for facilitating a shoulder replacement procedure can comprise placing a cut guide assembly on a reamer in a proximal humerus of a patient, securing a parallax-free alignment indicator device 200 to the cut guide assembly, activating the light source 210 of the device 200 to project an alignment indicator 216 along the version axis, aligning a forearm of a patient with the alignment indicator 216 , fixing the position of at least a portion of the cut guide assembly relative to the proximal humerus, and cutting the proximal humerus according to the cut guide assembly.
  • the method can also comprise using the alignment indicator 216 to ensure the version of a subsequent rasp or reamer inserted into the cut humerus is aligned with the version of the humeral cut.
  • the method can also comprise using the alignment indicator 216 to ensure the version of an implant is aligned with both the version of the rasp and the version of the cut humerus prior to engagement with the cut humerus.
  • Example 1 is a device that can comprise a housing defining an aperture, wherein the housing can be selectively securable via a fastener to an instrument in a selected orientation relative to the instrument; and a light source assembly that can be at least partially disposed in the housing, the light source assembly comprising a light source operably coupled to a power source via a power circuit, wherein the light source can be positioned within the housing to emit through the aperture of the housing, wherein, upon activation, the light source assembly can emit a parallax-free alignment indicator along an alignment axis having at least one of a selected angle and a selected displacement relative to a selected reference axis, and wherein the alignment indicator can guide a surgical procedure.
  • Example 2 the subject matter of Example 1 can optionally be configured such that the light source assembly comprises one of a laser and a light-emitting diode.
  • Example 3 the subject matter of any one or more of Examples 1-2 can optionally be configured such that the light source assembly further comprises an adjuster for selectively adjusting at least one of the selected angle and the selected displacement of the alignment indicator.
  • Example 4 the subject matter of Example 3 can optionally be configured such that the adjuster comprises a mirror.
  • Example 5 the subject matter of any one or more of Examples 3-4 can optionally be configured such that the adjuster comprises a lens.
  • Example 6 the subject matter of any one or more of Examples 3-5 can optionally be configured such that the adjuster can be manually adjustable by a user.
  • Example 7 the subject matter of any one or more of Examples 3-6 can further comprise a controller having a controller interface, wherein the controller can be operably coupled to the adjuster, wherein the adjuster can be adjustable via the controller based on manipulation of the controller interface by a user.
  • Example 8 the subject matter of any one or more of Examples 1-7 can optionally be configured such that the alignment indicator further comprises a plurality of alignment indicators, wherein each of the plurality of alignment indicators can be projected along an alignment axis having a unique selected angle relative to the selected reference axis.
  • Example 9 the subject matter of any one or more of Examples 1-8 can optionally be configured such that the alignment indicator further comprises a plurality of alignment indicators, wherein each of the plurality of alignment indicators can be spaced along the alignment axis.
  • Example 10 the subject matter of any one or more of Examples 1-9 can optionally be configured such that the alignment indicator comprises at least one of a line, a dot, a scale, and a logo.
  • Example 11 the subject matter of any one or more of Examples 1-10 can optionally be configured such that the alignment axis can be adjustable about and between a first angle and a second angle with respect to the selected reference axis.
  • Example 12 the subject matter of Example 11 can optionally be configured such that the alignment axis can be adjustable in fixed increments.
  • Example 13 the subject matter of any one or more of Examples 1-12 can optionally be configured such that the power source comprises one of a battery and a solar cell.
  • Example 14 the subject matter of any one or more of Examples 1-13 can optionally be configured such that the power circuit comprises a first lead and a second lead, both exposed on an exterior surface of the housing in a location designed to contact a metal object to complete the power circuit and activate the light source.
  • Example 15 the subject matter of Example 14 can optionally be configured such that the metal object comprises one of a portion of the instrument and a portion of the fastener of the housing.
  • Example 16 the subject matter of any one or more of Examples 1-15 can optionally be configured such that the power circuit comprises a first lead and a second lead that can be selectively coupled to complete the power circuit upon application of pressure.
  • Example 17 the subject matter of any one or more of Examples 1-16 can optionally be configured such that the power circuit comprises a switch disposed on an exterior surface of the housing.
  • Example 18 the subject matter of any one or more of Examples 1-17 can optionally be configured such that the fastener comprises one of a magnet, a threaded member, and a clip.
  • Example 19 the subject matter of any one or more of Examples 1-18 can optionally be configured such that the fastener further comprises a vibration dampener.
  • Example 20 the subject matter of Example 19 can optionally be configured such that the vibration dampener comprises a spring.
  • Example 21 the subject matter of any one or more of Examples 1-20 can optionally be configured such that at least a portion of the light source assembly comprises a modular cartridge receivable in the housing.
  • Example 22 is a method the can comprise securing a device to a surgical instrument, the device comprising: a housing defining an aperture, wherein the housing can be selectively securable via a fastener to the surgical instrument in a selected orientation relative to the instrument; and a light source assembly at least partially disposed in the housing, the light source assembly comprising a light source operably coupled to a power source via a power circuit, wherein the light source can be positioned within the housing to emit through the aperture of the housing; activating the light source to project a parallax-free alignment indicator along an alignment axis having at least one of a selected angle and a selected displacement relative to a selected reference axis; aligning an anatomical feature of a patient with the alignment indicator; fixing the position of at least a portion of the surgical instrument relative to a surgical site on the patient.
  • Example 23 the subject matter of Example 22 can optionally be configured such that the surgical instrument can be a cut guide assembly.
  • Example 24 the subject matter of any one or more of Examples 22-23 can optionally be configured such that the surgical site comprises the proximal humerus.
  • Example 25 the subject matter of any one or more of Examples 22-24 can optionally be configured such that the anatomical feature of the patient comprises a forearm.
  • Example 26 the subject matter of any one or more of Examples 22-25 optionally includes providing a mark on the patient along the alignment indicator.
  • Example 27 is a method that can comprise placing a cut guide assembly on a first rasp engaged in a proximal humerus of a patient; securing a device to the cut guide assembly, the device comprising: a housing defining an aperture, wherein the housing can be selectively securable via a fastener to the surgical instrument in a selected orientation relative to the instrument; and a light source assembly comprising a light source operably coupled to a power source via a power circuit, wherein the light source can be in communication with the aperture of the housing; activating the light source to project a parallax-free alignment indicator along an alignment axis having at least one of a selected angle and a selected displacement relative to a selected reference axis; aligning a forearm of a patient with the version indicator; fixing the position of at least a portion of the cut guide assembly relative to the proximal humerus; cutting the proximal humerus according to the cut guide assembly.
  • Example 28 the subject matter of Example 27 optionally includes using the version indicator to ensure the version of a second rasp inserted into the cut humerus is aligned with the version of the humeral cut.
  • Example 29 the subject matter of Example 28 optionally includes using the version indicator to ensure the version of an implant is aligned with both the version of the second rasp and the version of the cut humerus prior to engagement with the cut humerus.
  • the terms “a” or “an” are used, as is common in patent documents, to include one or more than one, independent of any other instances or usages of “at least one” or “one or more.”
  • the term “or” is used to refer to a nonexclusive or, such that “A or B” includes “A but not B,” “B but not A,” and “A and B,” unless otherwise indicated.

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  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Oral & Maxillofacial Surgery (AREA)
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  • Engineering & Computer Science (AREA)
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  • Vascular Medicine (AREA)
  • Surgical Instruments (AREA)
  • Prostheses (AREA)
US16/324,379 2016-08-31 2017-08-31 Parallax-free indicator devices, systems, and methods Active 2037-10-27 US11376092B2 (en)

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US20190175298A1 (en) 2019-06-13

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